CI vs CD: Continuous Integration vs Continuous Delivery/Deployment
Overview CI (Continuous Integration) and CD (Continuous Delivery/Deployment) are two connected stages of the same pipeline, not synonyms. CI focuses on automated testing of every code change as it merges, while CD focuses on automated deployment of that validated code into staging or production. Teams that only automate the first half often assume they have full ‘CI/CD’ when they’ve really just automated build-and-test. Comparison Diagram CICDCommitBuildTestPackageStagingProductionRuns automatically on every commitDelivery: manual approval before ProductionDeployment: fully automatic, no gateCI verifies the code — CD gets it running Comparison Table Aspect CI (Continuous Integration) CD (Continuous Delivery/Deployment) Trigger Code commit or push to a shared repository A successful CI run producing a new build artifact Core process Compile, run unit/integration tests, static analysis Package the artifact, provision environments, run deployment scripts Primary output A verified, mergeable build artifact A running release in staging and/or production Environment scope Build server or ephemeral test environment Staging and/or production environments Human gate None — fully automated on every commit Optional manual approval (Delivery) or none (Deployment) Release cadence N/A — runs per commit, not a release event Can range from multiple times a day to once per commit Failure consequence Blocks the merge; breaks the build for the team Blocks or rolls back the release; production stays on the last good version Primary goal Catch integration bugs early, keep the main branch releasable Get every releasable build to users quickly and safely Key Differences CI’s output is a verified build artifact, not a live release CD adds environment provisioning and deployment steps that CI never performs A CI failure blocks the merge; a CD failure blocks the rollout instead Continuous Delivery keeps a manual approval gate before production, while Continuous Deployment removes it CI runs on every single commit; CD can be throttled by environment or business readiness When to Use Each CI (Continuous Integration) ...